feat(self-hosted): add setup.sh and run.sh scripts for self-hosted supabase (#45603)

docker/.env.example

@@ -1,3 +1,16 @@
+############
+# Docker compose override files to layer on top of docker-compose.yml.
+# Native docker compose COMPOSE_FILE: colon-separated list, base file first.
+# Manage with: ./run.sh config add|remove <name>
+#
+# Examples:
+#   COMPOSE_FILE=docker-compose.yml
+#   COMPOSE_FILE=docker-compose.yml:docker-compose.pg17.yml
+#
+############
+COMPOSE_FILE=docker-compose.yml
+
+
 ############
 # Secrets
 #
@@ -8,7 +21,8 @@
 # https://supabase.com/docs/guides/self-hosting/docker#configuring-and-securing-supabase
 #
 # To generate secrets and API keys:
-# sh ./utils/generate-keys.sh
+# 1. sh utils/generate-keys.sh
+# 2. sh utils/add-new-auth-keys.sh
 #
 ############